Annelida and cephalopods have a(n) _____ circulatory system
Fill in the blank(s) with correct word
closed
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A microbiologist must culture a patient's feces for intestinal pathogens. Which of the following components would likely be present in a selective medium for this purpose?
A. NaCl B. Thioglycolic acid C. Bile salts D. Peptone E. Sheep red blood cells
__________ results in an early embryo that has three primary tissue layers. Fill in the blank(s) with the appropriate word(s)
Anthrax is
A. a zoonosis. B. only seen sporadically in the United States. C. transmitted by contact, inhalation, or ingestion. D. a disease that, in humans, can cause a rapidly fatal toxemia and septicemia. E. All of the choices are correct.
This British clergyman and economist was one of the first to recognize that the human population
cannot continue to increase indefinitely:a. Malthus b. Gause c. Schoener d. Peterson e. Hastings